If the strain rate in a polymer can be represented by the following equation d dt (1 E) d dt Where strain, stress, viscosity, E modulus of elasticity, and t time, derive Equation 16 5, assuming constant strain (i e , d 0) What is the relaxation time () in Equation 16 5 a function of ...

Under constant strain conditions d 0 the above equation can be rearra ...

If the strain rate in a polymer can be represented by the following equation: d/dt = /

Question:

If the strain rate in a polymer can be represented by the following equation:
dε/dt = σ/η + (1/E) dσ/dt
Where ε = strain, σ = stress, η = viscosity, E = modulus of elasticity, and t = time, derive Equation 16-5, assuming constant strain (i.e., dε = 0). What is the relaxation time (λ) in Equation 16-5 a function of?